Sometimes, a character is better off just as an alternate. Especially when a specific character has had that Superhero identity in the past and still fights roughly the same. And as much as NRS is capable of making characters unique, I am not really a fan of their choices. I don't like that Batgirl comes across like some Assassin with those forearm blades and her stab happy moves. Or the fact that Zod is some kind of mad scientists with guns and Phantom Zone creature summons.

I don't want to imagine how they'd try to differentiate Robin, so he isn't like Batman, Batgirl or Nightwing. Capcom seems more capable at making similar character unique, yet still true to their character.